Glen Arbor, Michigan has a Humid Continental Mild Summer, Wet All Year climate (Köppen classification: Dfb). Average annual temperatures range from 38.3 °F (low) to 53.9 °F (high). Annual precipitation averages 33.4 Inches. Glen Arbor is located in USDA Plant Hardiness Zone 6b. The growing season typically runs from the last frost around May 11 - May 20 through the first frost around Oct. 11 - Oct. 20.
| Month | Avg. Low | Avg. High | Avg. Precip |
|---|---|---|---|
| January | 18.2 °F | 28.7 °F | 2.29 in. |
| February | 17.9 °F | 30.2 °F | 1.59 in. |
| March | 23.4 °F | 39.1 °F | 1.9 in. |
| April | 33.0 °F | 51.2 °F | 2.94 in. |
| May | 43.4 °F | 63.6 °F | 3.1 in. |
| June | 53.0 °F | 73.1 °F | 3.0 in. |
| July | 58.9 °F | 77.5 °F | 2.76 in. |
| August | 59.5 °F | 76.6 °F | 2.97 in. |
| September | 52.9 °F | 70.5 °F | 3.56 in. |
| October | 42.3 °F | 57.7 °F | 3.96 in. |
| November | 32.9 °F | 44.6 °F | 2.87 in. |
| December | 24.5 °F | 33.9 °F | 2.42 in. |
| Annual | 38.3 °F | 53.9 °F | 33.36 in. |
| Average First Frost Date | Oct. 11 - Oct. 20 |
| Average Last Frost Date | May 11 - May 20 |
| Average Days With Frost | 125-150 Days |
| Plant Hardiness Zone | Zone 6b : -5°F to 0°F |
| Plant Hardiness Zone - 2012 | Zone 6a : -10°F to -5°F |
| Current Drought Conditions | Normal |
| Köppen Climate Classification | Dfb - Humid Continental Mild Summer, Wet All Year |